Basically, we're running into an issue where we're being returned a HTTP error 500 when trying to view the webform submissions download page, i.e. the following page: https://www.hartmanns.dk/en/admin/structure/webform/manage/hartmanns_academy_08_september/results/download
When trying to access our download page, we see a HTTP error 500 with the following logs:
AH01071: Got error 'PHP message: PHP Fatal error: Declaration of Drupal\\webform\\Plugin\\WebformElement\\WebformSignature::accessFileDownload($uri) must be compatible with Drupal\\webform\\Plugin\\WebformElementFileDownloadAccessInterface::accessFileDownload(string $uri) in /var/www/vhosts/hartmanns.dk/httpdocs/web/modules/contrib/webform/src/Plugin/WebformElement/WebformSignature.php on line 30\n', referer: https://www.hartmanns.dk/en/admin/structure/webform/manage/hartmanns_academy_08_september/results/submissions
Have any of you run into this issue? We've tried clearing cache, setting the correct permissions etc., however, from the logs it seems to be an incompatibility issue.
We're running Drupal core 8.9.20 & Webform 6.1.3.
Any help is greatly appreciated. :)