<regex> <regular expresion> of <something> is not defined

[Jonathan]

What is the pipe doing in there btw? (edited: disregard, found a good explanation and sharing here for future reference)

Pipe Character in Relevance

This starts with: value of setting "_BESClient_Download_LimitBytesPerSecond" of client Which gets the value of that client setting. value of setting "_BESClient_Download_LimitBytesPerSecond" of client | "-1" Adds | "-1" which provides error handling. Essentially it means if whatever to the left produces an error, use the value to the right (in this case -1). The reason why this is useful is because value of <setting> will produce an error if the setting does not exist. Finally: value of …