This error you can see during customer registration process:
TECHNICAL ERROR: unable to load form.
Details: Error thrown: [object Object] Text status: error
Here is some solutions of the problem:
1) Disable mobile theme Preferences > Themes > “Enable the mobile theme: I'd like to disable it, please.”
2) Disable the module “Social Login” Developed by: LoginRadius (if you have this module).
3) Try this solution in /themes/default/authentication.tpl about line 97 there was line:
change it to:
url: baseUri + 'index.php?controller=authentication',
This solution from here