[Bug]: AutoArima's predict method with exogenous variables

[bdiptesh]

Contact Details

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Describe the bug

When calling AutoArima with exogenous variables, if the length of the y_var is greater than 1, it's throwing an error.

How can we reproduce the bug

• Set y_var as sales
• Set x_var as ["cost", "holiday"]
• Instantiate an AutoArima model with exogenous variables

AutoArima model throws an error.

Expected behavior

No errors should be raised.

Version

v0.4.0 (Default)

Relevant log output/screenshots

No response

Additional context

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