Is the error still present after you restart IIS? Also, are there any issues when using Chrome and Firefox?
Would it be possible to try deleting the log files found in the App_Data/Sitefinity/Logs folder, reproducing the error and after that attach the log.
Thank you in advance.
I am glad to hear that you managed to resolve the problem.Kind regards,
Thank you for sharing the solution with the community.Regards,