Variable assignments in bash scripts require no space between the variable name and value or (unless quoted) within the value. Since a space was present in the line FILEBACKUPLOCATION= /../.../FMonday, it attempted to execute /../.../FMonday as a command (which caused the first error) with FILEBACKUPLOCATION assigned to an empty string. The variable was then not assigned when the other command further down tried to use it (accounting for the second error).
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