Symbol resolve failed all the time...

[pottertech]

I started with "https://github.com/shaqarava/TradingView-UDF" as my base because I need the UDF to be in PHP. I always get "Symbol resolve failed:

"COINBASEPRO:BTC/USD, reason: invalid symbol" message and no chart. I have no idea what I am doing wrong at this point.

My web page can be reached at "http://94.237.73.33/chart-example.html" and the code is as follows:

*** Console logs Symbol resolve requested: BTC/USD library.4876b44fcf466b634068.js:186:2100 Event "panes_order_changed", arguments: [] library.4876b44fcf466b634068.js:568:283 Symbol resolve failed: BTC/USD, reason: invalid symbol library.4876b44fcf466b634068.js:186:2100 Event "series_properties_changed", arguments: ["lQwFlf"] library.4876b44fcf466b634068.js:568:283```

Symbol

BTC/USD on COINBASEPRO exchange

Any help is greatly appreciated.