Description of problem:
when I use any modulefile fonctions like:
> module avail
I get:
/usr/bin/lua: /usr/share/lua/5.4/json/decode/util.lua:97: attempt to call a string value (field 'version')
stack traceback:
	/usr/share/lua/5.4/json/decode/util.lua:97: in main chunk
	[C]: in function 'require'
	/usr/share/lua/5.4/json/decode.lua:12: in main chunk
	[C]: in function 'require'
	/usr/share/lua/5.4/json.lua:5: in main chunk
	[C]: in function 'require'
	/usr/share/lmod/lmod/libexec/../shells/JsonShell.lua:46: in main chunk
	[C]: in function 'require'
	/usr/share/lmod/lmod/libexec/../shells/BaseShell.lua:295: in upvalue 'l_createShellTbl'
	/usr/share/lmod/lmod/libexec/../shells/BaseShell.lua:327: in function 'BaseShell.isValid'
	/usr/share/lmod/lmod/libexec/utils.lua:1189: in function 'dynamic_shell'
	/usr/share/lmod/lmod/libexec/lmod:345: in function 'main'
	/usr/share/lmod/lmod/libexec/lmod:585: in main chunk
	[C]: in ?


Version-Release number of selected component (if applicable): 8.7.37

How reproducible:
fedora 40 update with Lmod installed, call
`module avail`

Actual results:
Erreur.

Expected results:
return liste of available modules