Error when running ES_prediction.py

[guoliang-biomap]

Dear AlexanderKroll:
When I ran ES_prediction.py using the example, an error occurred:

File ~/ESP_prediction_function/code/ES_prediction.py, line 27, in ESP_predicton
df_ES = merging_metabolite_and_enzyme_df(df_met, df_enzyme, df_ES)
File ~/ESP_prediction_function/code/ES_prediction.py, line 63, in merging_metabolite_and_enzyme_df
if gnn_rep != "":
ValueError: The truth value of an array with more than one element is ambiguous. Use a.any() or a.all()

Input data:
substrates = ["C00069"]
enzymes = ["MARLPFYLLVISTLLLVVTADSFLARPPSSSFLHALSNKRASTPASLPSCSLDFLLQTRGGTAANAATTALPTSALVERKGGAAVALEGGKTLWEKSKVWVFIGLWYFFNVAFNIYNKKVLNALPLPWTVSIAQLGLGALYTMFLWLVRARKMPTIAAPEMKTLSILGVLHAVSHITAITSLGAGAVSFTHIVKSAEPFFSAVFAGLFFGQFFSLPVYAALIPVVSGVAYASLKELTFTWLSFWCAMASNVVCAARGVVVKGMMGGKPTQSKDLTSSNMYSVLTILAALVLLPFGALVEGPGLHAAWKAAAAHPSLTNGGTELAKYLVYSGLTFFLYNEVAFAALESLHPISHAVANTIKRVVIIVVSVLVFRNPMSTQSIIGSSTAVIGVLLYSLAKHYCK"]

Could you please tell me how to fix this problem?