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2 format the error
source | link

http://website.com/admin/admin/import/validate/key/40cc16dabfa0d1fb09a6cb9e62433b9880e4f3f0e024eb1c517d832fa47c225d/?form_key=s235x0mqERyjXLqX 504 (Gateway Timeout) `validation.js:185
while Import customer address csv in admin. What is solution? 

while Import customer address csv in admin. What is solution?

http://website.com/admin/admin/import/validate/key/40cc16dabfa0d1fb09a6cb9e62433b9880e4f3f0e024eb1c517d832fa47c225d/?form_key=s235x0mqERyjXLqX 504 (Gateway Timeout) `validation.js:185
while Import customer address csv in admin. What is solution?

http://website.com/admin/admin/import/validate/key/40cc16dabfa0d1fb09a6cb9e62433b9880e4f3f0e024eb1c517d832fa47c225d/?form_key=s235x0mqERyjXLqX 504 (Gateway Timeout) `validation.js:185 

while Import customer address csv in admin. What is solution?

1
source | link

504 gateway timeout while import customer address CSV In Magento2

http://website.com/admin/admin/import/validate/key/40cc16dabfa0d1fb09a6cb9e62433b9880e4f3f0e024eb1c517d832fa47c225d/?form_key=s235x0mqERyjXLqX 504 (Gateway Timeout) `validation.js:185
while Import customer address csv in admin. What is solution?