A screenshot of the error and a debug report are the best ways to help me find and fix a problem.
Check every screenshot for student information first. FERPA does not allow student names, ID numbers, grades or other personally identifiable information to be shared here, so crop or cover anything like that before you attach the image.
To attach a debug report, click the GradeSend icon in your browser toolbar and choose Contact. This page opens with the report already attached. Or, in GradeSend, open Settings → Reports & Diagnostics → Download Debug Report and attach the file below. Debug reports never include student names, ID numbers or grades.