lovedigit
👽 Chevereto Freak
▶ Reproduction steps
I could replicate it on demo website as well:

The website throws 500 internal server error without debug level set to 3. The debug trace is as follows.
📃 Error log message
Fatal error [400]: Array and string offset access syntax with curly braces is deprecated
Triggered in /app/routes/route.connect.php:193
Stack trace:
#0 /lib/G/classes/class.handler.php(230): G\Handler->{closure}()
#1 /lib/G/classes/class.handler.php(130): G\Handler->processRequest()
#2 /app/web.php(471): G\Handler->__construct()
#3 /app/loader.php(299): require_once('/app/web.php')
#4 /index.php(20): include_once('/app/loader.php')
- Go to signup page
- Create account using "Continue with twitter" button
- An error will be thrown after authorizing the app
- It is possible that other social media is broken as well.
I could replicate it on demo website as well:

The website throws 500 internal server error without debug level set to 3. The debug trace is as follows.
📃 Error log message
Fatal error [400]: Array and string offset access syntax with curly braces is deprecated
Triggered in /app/routes/route.connect.php:193
Stack trace:
#0 /lib/G/classes/class.handler.php(230): G\Handler->{closure}()
#1 /lib/G/classes/class.handler.php(130): G\Handler->processRequest()
#2 /app/web.php(471): G\Handler->__construct()
#3 /app/loader.php(299): require_once('/app/web.php')
#4 /index.php(20): include_once('/app/loader.php')