Hi Aida,
I think there is a plugin conflict/compatibility issue.
Please kindly do a plugin compatibility check by doing these steps to identify the error :
=> Deactivate your additional plugins except WooCommerce and Variation Swatches for WooCommerce.
=> See if the problem persists. If the issue is resolved, you can activate your additional plugins individually to determine which plugin might be the culprit of this error.
Looking forward to hearing from you soon.
Thank you
error
Aida Sf