Product Filter Wheel keeps Spinning

[MAD King]

When I click on "Products" at the backend, the website freezes and I am not able to click for about 10 seconds on anything and after that the Filter Wheel keeps spinning.

I am not sure if this is related to topic

http://forum.virtuemart.net/index.php?topic=143514.0

Joomla! 3.9.11
VirtueMart 3.6.0 10113

[GJC Web Design]

something is failing your product categories ajax call .. check the console/ browser debug to see the response to the

/index.php?option=com_virtuemart&view=product&type=getCategoriesTree&virtuemart_product_id=xxx&format=json&lang=xx

[MAD King]

It shows

- Unexpected control character found{

and then the list of categories with values.

[GJC Web Design]

hmmm...   some strangely named cat?   with comma or quote for example?

[MAD King]

No.  Just characters (ABC).
It started doing this after I recently updated VM.

[MAD King]

I disabled everything under Extension-Manage except these two

VirtueMart
VirtueMart Administrator Menu

and this error still pops up.

[Studio 42]

If you have PHP error display On, then if you have any error the json is not well formated.
Disable PHP debug(in joomla and in your server) and try if it work.

[MAD King]

It's off. I never turn them on.

[Studio 42]

Check in the javascript console and/ or json response

[MAD King]

I do not know how to do this.

[Studio 42]

On google chrome F12 and the network>XHR tab display all ajax response.
YOu have first to open the console and refresh the page after, to be sure to see the response
But - Unexpected control character found{ is strange for a json, because json use this for the response !
If you have anything outside the curly brackets, then you get en error and categories cannot be loaded.

[MAD King]

Thank you. The XHR tab does not show anything except that it loaded probably. How else can I find what causes this error?

[MAD King]

I tested it with the Beez3 - Default template with nothing in it and I get the same error when I click on the + on the VM - Search in Shop. So, it has to do something with VM since it occurred after the latest VM update.

[Jörgen]

Check your search module, do you have some custom text perhaps?
Jörgen @ Kreativ Fotografi

[MAD King]

No custom text and I disabled already all modules except VirtueMart and VirtueMart Administrator Menu and this error still pops up. It must be something inside VM I guess. Max just messaged me that 3.6.2 has been released. I will test it with that.