"Add a price by a catalog" flakes: 'id:price-catalog-name' did not match any elements

[php-coder]

------------------------------------------------------------------------------
FAIL: Robotframework.Series.Add-Price.Logic.Add a price by a catalog
Several failures occurred:

1) Element locator 'id:price-catalog-name' did not match any elements.

2) Element locator 'id:price-catalog-name' did not match any elements.
==============================================================================

Seen there: https://travis-ci.org/github/php-coder/mystamps/jobs/700581567

[php-coder]

One more: https://travis-ci.org/github/php-coder/mystamps/jobs/700591650

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https://travis-ci.org/github/php-coder/mystamps/jobs/702929751

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https://travis-ci.org/github/php-coder/mystamps/jobs/719107233

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https://travis-ci.org/github/php-coder/mystamps/jobs/719998617

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https://travis-ci.org/github/php-coder/mystamps/jobs/749800168

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https://travis-ci.com/github/php-coder/mystamps/jobs/482882152

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https://app.travis-ci.com/github/php-coder/mystamps/jobs/544085001
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https://app.travis-ci.com/github/php-coder/mystamps/jobs/581906493