empty Exchange Rates section empty

Hi, got
i’ve just Currency Switcher for WooCommerce 2.9.4 (free version)
and put one additional currency – Eu.
When i had activate this currency (Enabled) https://joxi.ru/E2ppeB0H9D4LX2
, the other section – Exchange Rates section became empty https://joxi.ru/bmoJY0GUxe7Ykr.
If the Additional currency not activated https://joxi.ru/krDRqj3cEqgYX2,
the section Exchange Rates is normal (or looks like normal) – https://joxi.ru/1A5GZXginYza8m.
I tried to reinstall the program twice but the result did not change.
The WP version 4.9.8 and WooCommerce 3.4.7 with CHROME browser.
Is it wrong something with my web?
any answer would be helpful.

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