After updating the Form plugin to v4.0.2 (and Email plugin to v3.0.5 and Grav to 1.6.2), I am no longer able to upload files larger than ~500kb via the GUI.
The Max Filesize on Plugin: Form is set to use the system default (which is 64M). However, even changing the Max Filesize doesn’t allow larger files.
Everything was working prior the updates.
Any suggestions how to troubleshoot?
Here is how to error appears (larger image on left):