This is METAFONT, Version 2.71828182 (preloaded base=mf 2023.8.26)  8 SEP 2023 11:05
**fontninja.txt fonts-ninja.txt
(fontninja.txt
>> https
! Isolated expression.
<to be read again> 
                   :
l.1 https:
          //chrome.google.com/webstore/detail/fonts-ninja/eljapbgkmlngdpckoi...

? 
! Extra tokens will be flushed.
<to be read again> 
                   :
l.1 https:
          //chrome.google.com/webstore/detail/fonts-ninja/eljapbgkmlngdpckoi...

? 
! Interruption.
l.1 https:
          //chrome.google.com/webstore/detail/fonts-ninja/eljapbgkmlngdpckoi...

? q
OK, entering batchmode...
)
! File ended while scanning to the end of the statement.
<inserted text> 
                ;
<*> fontninja.txt
                  fonts-ninja.txt
A previous error seems to have propagated,
causing me to read past where you wanted me to stop.
I'll try to recover; but if the error is serious,
you'd better type `E' or `X' now and fix your file.

! Emergency stop.
<*> fontninja.txt fonts-ninja.txt
                                 
*** (job aborted, no legal end found)