Error #2038: File I/O Error

in Bug reports
Happened when I was trying to save my file as an iteration.
Details:
Details:
Error #2038: File I/O Error.
Error: Error #2038: File I/O Error.
at pyx.io::PyxelSaver$/doWriteZipFile()
at pyx.io::PyxelSaver$/saveDocument()
at Function/<anonymous>()
at Function/<anonymous>()
Comments
My Mac's system specs:
Model Name: MacBook Pro
Model Identifier: MacBookPro11,3
Processor Name: Intel Core i7
Processor Speed: 2.8 GHz
Number of Processors: 1
Total Number of Cores: 4
L2 Cache (per Core): 256 KB
L3 Cache: 6 MB
Memory: 16 GB
(edit: added clarification)
I checked out the file and didn't see anything weird or wrong, only a lot of colors being null, which is somewhat normal but the quantity of it made me suspect that it could be caused by the config file.
The file could not be saved.
Error #2038: File I/O Error
I do notice that whenever I do a 'save as' but just in a different folder (I do not change the name), it seems to work fine. Looks like something when you change the filename only?
If I navigate to where I want to "Save As" from a route folder it will work. Somehow the bug is in identifying the file path.
Hope this can be fixed but I'm really glad there's a workaround!
Error #2038: File I/O Error.
Can confirm that even just navigating through the save as file picker is a work around.
PE version 0.4.5, MacOS 10.13.3