Good morning.
Gbif data may need correction to ensure data standards. Your experience is more in this field.
Possibly there may be dome errors within the csv file. Or the geocat software can be reinstalled with the recent version.
Ensuring right lat long co ordinates is essential and each record has to be checked.
Some values may be zero, or empty, with full stop, comma ir sone space. Single point also can cause issues.
I think geocat does not accept more than 1000 records.
Or if the data is not up to the species level also it can create problem.
Hope these points will be of use to you.
Warm regards
Sathya Sangeetha