Images, Export, ExportString and ExportForm do not work on version 14.0

[s4m13337]

On Wolfram Engine version 14.0, when trying to return an Image or its Base64 encoded version using ExportString/ExportForm, the kernel keeps evaluating the request forever.

For example, this one keeps evaluating indefinitely:

ExportString[
 Histogram[RandomVariate[NormalDistribution[0, 1], 200]], 
  ColorFunction -> "Pastel"], {"Base64", "PNG"}
 ]

[DavidSchonfeld]

I have the same issue specifically on a linux machine. A local windows prototype functions, as does for example the cellular automata demo. Running the same programs in the other environment hangs for any 'visual' output.
As an obvious example python3 -m wolframwebengine --demo ca hangs.
Wolframscript is being run, for example the following will print the log 8 before hanging on ExportForm.
Print[2^3]; ExportForm[Graphics[Disk[]], "GIF"]

Update
Moving to wolframscript gave me error messages for the above simple cases, which I used to debug library omissions on the system. Installing these fixed the issue for me.