Type of Issue (Bug / Crash / Suggestion / Translation / ...):

Potion of Detection does not work (no entities are highlighted).

Version of the mod or build number:

Version 0.3.04-hotfix release

Minecraft Version (1.9.4, 1.10, 1.10.2...):

1.10.2 w/ Forge 12.18.3.2185 (Recommended version)

Description of the issue (or what were you doing when it crashed):

No crash occurs and no errors appear in the log. For testing, I tried both giving myself a potion from the creative inventory and brewing a potion manually. Neither worked.

Pastebin of the log (fml-client-latest.log from your instance/logs folder):

https://pastebin.com/L8Pucx5L

ModPack (or list of mods via Pastebin. If using a modified modpack, write BOTH the modpack AND the link to the full mod list):

No modpack; tested with only Extra Alchemy and Forge.

Pastebin of the config file (extraalchemy.cfg from your instance/config folder):

https://pastebin.com/PmwmxPct

OS and Java version (Java8 + Windows10 / Java7 + MacOS / ...):

Java 8/Windows 10

Other information that you think might be useful:

(-)

Judging by the log I assume you are playing in a single player world, am I correct?

Yes, single-player only.