Error in the file dependencies.min.js


An Error occur when trying to send the quotation as email. I cannot insert Email Template tags into the Body textfield

After tracing I catch the following error

Uncaught TypeError: Cannot use ‘in’ operator to search for ‘length’ in {}
at c (dependencies.min.js:1)
at Function.each (dependencies.min.js:1)
at inject_email_template (scripts.min.js:1)
at HTMLDocument. (1:340)
at j (dependencies.min.js:2)
at Object.fireWith [as resolveWith] (dependencies.min.js:2)
at Function.ready (dependencies.min.js:2)
at HTMLDocument.h (dependencies.min.js:1)

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