I've been in the process of upgrading Moodle from v. 2.2.3 to v. 2.7.4 and have several issues that I would like help with please.
Please note that I upgraded using each stable legacy version to get to v. 2.7.4 in hopes that some initial issues would be resolved. They were not, so I'm here to get some assistance.
The primary issue is that Moodle is not finding any of the uploaded files that our instructors have place in their classes, i.e.; PDFs, or other types of documents. It's also not finding the photos that students have uploaded to their accounts. This is the error code I'm getting with this issue:
The second issue that has been recurring since v. 2.2.3 happens when we attempt to upload a new file, an error message, "invalid JSON String" comes up and after several attempts we are finally able to upload the file. After the upgrades to v. 2.7.4 the error message occurs, but even after several attempts there is no upload.
The third issue began after the installation of v. 2.3.11 and here is a screen shot of that error message:
I would appreciate any advice possible as our classes begin again in one week.