So I know this doesn't seem right, but I ran into the same problem and tried to fix for hours. I ended up deleting my DB and started again. Loaded my first page and it STILL was throwing the style error. I literally did a hard refresh (Ctrl+F5) and it loaded. Not joking!

After hours of seriously questioning life choices I found the issue.
The problem occures when using different setups with the same domain ip especially (Enterprise, non enterprise setups)
It has to do with the caching in Odoo. Some assets don't get reloaded. The assets get a 304 Not Modified (see logs). But in fact they are modified and produce these weeird errors. 

I installed Odoo 18 with PyCharm the normal way I used to, then I got the error. I struggled for many days uninstalling and Installing different packages without any success. Then I deleted the databse through the odoo database manager and recreated it, and everything started working.

Hello so I faced the same issue and it disturbed me for days, I solved it by updating the base module. i.e. on your command line run python odoo-bin -c path_to_conf_file -u base.

same error I have faced , resolved by if sass installed then pip uninstall sass , then pip install libsaas and change the db and run it  worked for me

Hi,

Have you ensured that all your addon paths are correctly specified in the configuration file? The error suggests that Odoo might not be able to access the files in the specified addons directory. Could you please double-check the addon paths in the Odoo configuration file?

I am having the same issue. here is a screenshot of my odoo window. There is no custom code in the repo yet. also my odoo log stays empty upon running.

Here is a screenshot of my ide log: (its empty) 

Any ideas on how to fix this?

Hi, 

You can try reloading the asset bundles using the activate developer mode (with assets) option from settings.

if that doesn't work, try upgrading the base module.

Hope it helps

I am having the same problem

I did not create any custom module in which I can share the code I have set up a fresh version of Odoo 17 and after successfully completing installation I am getting this error.

This is the error on the browser,

The style compilation failed, see the error below. This is an administrator or developer error that must be fixed for the entire database before continuing working.

please provide your code and error log.