Warning: Cannot use a scalar value as an array

I keep getting this error and can't figure out what the problem is.

Warning: Cannot use a scalar value as an array in C:\wamp64\www\libraries\src\Document\Document.php on line 508
Call Stack
# Time Memory Function Location
1 0.0010 403048 {main}( ) ...\index.php:0
2 0.2808 1419336 Joomla\CMS\Application\SiteApplication->execute( ) ...\index.php:49
3 0.2808 1419336 Joomla\CMS\Application\SiteApplication->doExecute( ) ...\CMSApplication.php:196
4 2.0041 2677320 Joomla\CMS\Application\SiteApplication->dispatch( ) ...\SiteApplication.php:233
5 2.0051 2689984 Joomla\CMS\Component\ComponentHelper::renderComponent( ) ...\SiteApplication.php:194
6 2.0598 2820056 Joomla\CMS\Component\ComponentHelper::executeComponent( ) ...\ComponentHelper.php:377
7 2.0600 2837112 require_once( 'C:\wamp64\www\components\com_content\content.php' ) ...\ComponentHelper.php:402
8 2.0660 2847360 ContentController->execute( ) ...\content.php:43
9 2.0660 2847360 ContentController->display( ) ...\BaseController.php:710
10 2.2311 3057152 ContentController->display( ) ...\controller.php:118
11 2.2497 3070944 ContentViewArticle->display( ) ...\BaseController.php:672
12 2.3260 3148184 JEventDispatcher->trigger( ) ...\view.html.php:193
13 2.3260 3148256 PlgSystemModulesAnywhere->update( ) ...\dispatcher.php:160
14 2.3260 3148256 PlgSystemModulesAnywhere->onContentPrepare( ) ...\event.php:70
15 2.3260 3148256 PlgSystemModulesAnywhere->run( ) ...\modulesanywhere.php:49
16 2.4150 3256128 call_user_func_array:{C:\wamp64\www\plugins\system\modulesanywhere\src\Plugin.php:97} ( ) ...\Plugin.php:97
17 2.4150 3256552 RegularLabs\Plugin\System\ModulesAnywhere\Helper->onContentPrepare( ) ...\Plugin.php:97
18 2.4158 3257648 RegularLabs\Library\Article::process( ) ...\Helper.php:31
19 2.4168 3259592 RegularLabs\Library\Article::processText( ) ...\Article.php:200
20 2.4168 3260368 call_user_func_array:{C:\wamp64\www\libraries\regularlabs\src\Article.php:226} ( ) ...\Article.php:226
21 2.4168 3260432 RegularLabs\Plugin\System\ModulesAnywhere\Helper->processModules( ) ...\Article.php:226
22 2.4168 3260432 RegularLabs\Plugin\System\ModulesAnywhere\Replace::processModules( ) ...\Helper.php:81
23 2.4172 3260816 RegularLabs\Plugin\System\ModulesAnywhere\Replace::replace( ) ...\Replace.php:131
24 2.4363 3265328 RegularLabs\Plugin\System\ModulesAnywhere\Replace::replaceMatches( ) ...\Replace.php:176
25 2.4363 3330888 RegularLabs\Plugin\System\ModulesAnywhere\Replace::processMatch( ) ...\Replace.php:194
26 2.4367 3332000 RegularLabs\Plugin\System\ModulesAnywhere\Replace::processModule( ) ...\Replace.php:303
27 2.4400 3342392 Joomla\CMS\Document\Renderer\Html\ModuleRenderer->render( ) ...\Replace.php:558
28 2.4423 3343648 Joomla\CMS\Helper\ModuleHelper::renderModule( ) ...\ModuleRenderer.php:98
29 2.5002 3365296 include( 'C:\wamp64\www\modules\mod_gmapfp\mod_gmapfp.php' ) ...\ModuleHelper.php:200
30 2.5444 3377624 require( 'C:\wamp64\www\modules\mod_gmapfp\tmpl\default.php' ) ...\mod_gmapfp.php:39
31 2.5453 3381128 Joomla\CMS\HTML\HTMLHelper::_( ) ...\default.php:30
32 2.5453 3381568 Joomla\CMS\HTML\HTMLHelper::call( ) ...\HTMLHelper.php:111
33 2.5453 3382416 call_user_func_array:{C:\wamp64\www\libraries\src\HTML\HTMLHelper.php:239} ( ) ...\HTMLHelper.php:239
34 2.5453 3382840 Joomla\CMS\HTML\HTMLHelper::script( ) ...\HTMLHelper.php:239
35 2.5453 3383592 Joomla\CMS\Document\HtmlDocument->addScript( ) ...\HTMLHelper.php:741

( ! ) Warning: Cannot use a scalar value as an array in C:\wamp64\www\libraries\src\Document\Document.php on line 512
Call Stack
# Time Memory Function Location
1 0.0010 403048 {main}( ) ...\index.php:0
2 0.2808 1419336 Joomla\CMS\Application\SiteApplication->execute( ) ...\index.php:49
3 0.2808 1419336 Joomla\CMS\Application\SiteApplication->doExecute( ) ...\CMSApplication.php:196
4 2.0041 2677320 Joomla\CMS\Application\SiteApplication->dispatch( ) ...\SiteApplication.php:233
5 2.0051 2689984 Joomla\CMS\Component\ComponentHelper::renderComponent( ) ...\SiteApplication.php:194
6 2.0598 2820056 Joomla\CMS\Component\ComponentHelper::executeComponent( ) ...\ComponentHelper.php:377
7 2.0600 2837112 require_once( 'C:\wamp64\www\components\com_content\content.php' ) ...\ComponentHelper.php:402
8 2.0660 2847360 ContentController->execute( ) ...\content.php:43
9 2.0660 2847360 ContentController->display( ) ...\BaseController.php:710
10 2.2311 3057152 ContentController->display( ) ...\controller.php:118
11 2.2497 3070944 ContentViewArticle->display( ) ...\BaseController.php:672
12 2.3260 3148184 JEventDispatcher->trigger( ) ...\view.html.php:193
13 2.3260 3148256 PlgSystemModulesAnywhere->update( ) ...\dispatcher.php:160
14 2.3260 3148256 PlgSystemModulesAnywhere->onContentPrepare( ) ...\event.php:70
15 2.3260 3148256 PlgSystemModulesAnywhere->run( ) ...\modulesanywhere.php:49
16 2.4150 3256128 call_user_func_array:{C:\wamp64\www\plugins\system\modulesanywhere\src\Plugin.php:97} ( ) ...\Plugin.php:97
17 2.4150 3256552 RegularLabs\Plugin\System\ModulesAnywhere\Helper->onContentPrepare( ) ...\Plugin.php:97
18 2.4158 3257648 RegularLabs\Library\Article::process( ) ...\Helper.php:31
19 2.4168 3259592 RegularLabs\Library\Article::processText( ) ...\Article.php:200
20 2.4168 3260368 call_user_func_array:{C:\wamp64\www\libraries\regularlabs\src\Article.php:226} ( ) ...\Article.php:226
21 2.4168 3260432 RegularLabs\Plugin\System\ModulesAnywhere\Helper->processModules( ) ...\Article.php:226
22 2.4168 3260432 RegularLabs\Plugin\System\ModulesAnywhere\Replace::processModules( ) ...\Helper.php:81
23 2.4172 3260816 RegularLabs\Plugin\System\ModulesAnywhere\Replace::replace( ) ...\Replace.php:131
24 2.4363 3265328 RegularLabs\Plugin\System\ModulesAnywhere\Replace::replaceMatches( ) ...\Replace.php:176
25 2.4363 3330888 RegularLabs\Plugin\System\ModulesAnywhere\Replace::processMatch( ) ...\Replace.php:194
26 2.4367 3332000 RegularLabs\Plugin\System\ModulesAnywhere\Replace::processModule( ) ...\Replace.php:303
27 2.4400 3342392 Joomla\CMS\Document\Renderer\Html\ModuleRenderer->render( ) ...\Replace.php:558
28 2.4423 3343648 Joomla\CMS\Helper\ModuleHelper::renderModule( ) ...\ModuleRenderer.php:98
29 2.5002 3365296 include( 'C:\wamp64\www\modules\mod_gmapfp\mod_gmapfp.php' ) ...\ModuleHelper.php:200
30 2.5444 3377624 require( 'C:\wamp64\www\modules\mod_gmapfp\tmpl\default.php' ) ...\mod_gmapfp.php:39
31 2.5453 3381128 Joomla\CMS\HTML\HTMLHelper::_( ) ...\default.php:30
32 2.5453 3381568 Joomla\CMS\HTML\HTMLHelper::call( ) ...\HTMLHelper.php:111
33 2.5453 3382416 call_user_func_array:{C:\wamp64\www\libraries\src\HTML\HTMLHelper.php:239} ( ) ...\HTMLHelper.php:239
34 2.5453 3382840 Joomla\CMS\HTML\HTMLHelper::script( ) ...\HTMLHelper.php:239
35 2.5453 3383592 Joomla\CMS\Document\HtmlDocument->addScript( ) ...\HTMLHelper.php:741