error: TypeError: Cannot read property 'map' of undefine

[bumbalaga]

Hello, have any of you encountered a following error?

at /home/(HIDDEN)/forum/src/meta/templates.js:81:20
at /home/(HIDDEN)/forum/public/src/utils.js:39:13
at FSReqWrap.oncomplete (fs.js:82:15)
TypeError: Cannot read property 'map' of undefined
at /home/(HIDDEN)/forum/src/meta/templates.js:81:20
at /home/(HIDDEN)/forum/public/src/utils.js:39:13
at FSReqWrap.oncomplete (fs.js:82:1

It happened out of the blue for no particular reason.
If you have an idea of what can cause this, please let me know.