Just updated my Basel theme to 5.4.1 but when I log in as admin no CSS is getting displayed means the website is not properly visible. But when I logout as a normal customer or user website displays properly.
Thank you very much for choosing our theme and for contacting us.
Please deactivate all the plugins not related to the theme and switch the parent theme, check the issue, If the problem has gone, activate the plugins one by one, checking the issue to detect which one causes the problem.
if the problem remains, even after the plugins deactivated leave the plugins deactivated for us to check and provide your site admin access to the private area.