When exporting data on the Grid page, click the export icon to display the list of options

This afternoon, I started to explore how to use the grid extension to display the table. now the data is displayed, but the list of options is not displayed when I click the export icon. Now the page effect is as follows: The view code is as follows: {code...}] The error is as follows: why do you click Export drop-down box in the upper right corner...

This afternoon, I started to explore how to use the grid extension to display the table. now the data is displayed, but the list of options is not displayed when I click the export icon.
The current page effect is as follows:

The view code is as follows:

'Pja' => true, // load the loading animation 'bordered' => true, 'striped' => false, 'condensed '=> false, 'response' => true, 'hover '=> true, 'floathead' => true, 'floatheaderoptions' => ['scrollingtop' => 50], // 'showpagesummary' => true, 'panel '=> ['heading' =>'Countries ', 'type' => 'success', 'before' => Html: ('Create Country ', ['create'], ['class' => 'btn btn-success']), 'after' => Html: ('Reset Grid ', ['get-school-in-province'], ['class' => 'btn btn-info']), 'footer '=> false, 'port' => true, 'toolbar' => true,], 'portconfig' => [GridView: PDF => ['label' => 'Export csv ', 'icooptions' => ['class' => 'text-primary'], 'showheader' => true, 'showpagesummary '=> true, 'showfooter' => true, 'showcaption '=> true, 'filename' => 'User table '. date ("Y-m-d"), 'alertmsg' => 'are you sure you want to export a CSV file? ', 'Options' => ['title' => '',], 'Mime' => 'application/pdf ', 'config' => ['coldelimiter '=> ",", 'rowdelimiter' => "\ r \ n",],], // GridView :: HTML => [], // GridView: PDF => [],

]

The following error is reported:

Why didn't I respond when I click Export drop-down box in the upper right corner.
Q & !!!

Reply content:

This afternoon, I started to explore how to use the grid extension to display the table. now the data is displayed, but the list of options is not displayed when I click the export icon.
The current page effect is as follows:

The view code is as follows:

'Pja' => true, // load the loading animation 'bordered' => true, 'striped' => false, 'condensed '=> false, 'response' => true, 'hover '=> true, 'floathead' => true, 'floatheaderoptions' => ['scrollingtop' => 50], // 'showpagesummary' => true, 'panel '=> ['heading' =>'Countries ', 'type' => 'success', 'before' => Html: ('Create Country ', ['create'], ['class' => 'btn btn-success']), 'after' => Html: ('Reset Grid ', ['get-school-in-province'], ['class' => 'btn btn-info']), 'footer '=> false, 'port' => true, 'toolbar' => true,], 'portconfig' => [GridView: PDF => ['label' => 'Export csv ', 'icooptions' => ['class' => 'text-primary'], 'showheader' => true, 'showpagesummary '=> true, 'showfooter' => true, 'showcaption '=> true, 'filename' => 'User table '. date ("Y-m-d"), 'alertmsg' => 'are you sure you want to export a CSV file? ', 'Options' => ['title' => '',], 'Mime' => 'application/pdf ', 'config' => ['coldelimiter '=> ",", 'rowdelimiter' => "\ r \ n",],], // GridView :: HTML => [], // GridView: PDF => [],

]

The following error is reported:

Why didn't I respond when I click Export drop-down box in the upper right corner.
Q & !!!

Do you know this?