I'm getting errors today when trying to connect to workflow and forms I'm on a trial while we POC stuff to make sure we can achieve what we want before we buy. Trial still had a few weeks. Was working fine last week.
I tried re-installing workflow app but didn't help.
The Nintex ribbon buttons on lists/libraries don't display properly and when I click on the app in site contents or click on forms or workflow from a list it gives this error. From what I can see my tenant is fully operational, no errors.
Secure Connection Failed
An error occurred during a connection to workflowo365.nintex.com. Invalid OCSP signing certificate in OCSP response. Error code: SEC_ERROR_OCSP_INVALID_SIGNING_CERT
The page you are trying to view cannot be shown because the authenticity of the received data could not be verified. Please contact the website owners to inform them of this problem.