CONN v.18a Abd File Failed to Load

We have an issue that arises from time to time with CONN v.18a. When it's trying to load a file we get a failed to load file message.

There's a patch for this we have tried. But, this did not fix the issue that has occurred again.

The specific error is as follows.

Error using conn(line 740)
Failed to load file path_to.mat file

Error in conn(line 4055)
conn('load',filename,true);

We are using CONN with spm 12 and Matlab v. 2018b.