Beginner Gardening: Urgent Curry Leaf Plant help needed, 1 by mic_ps

mic_ps wrote:
Sir,

I am actually living in Valencia Spain and last September i bought a curry leaf plant from Reunion island on a visit and it is about 10 inches tall.Since January it has lost its leaves and now its small branches too first the leaves becoming yellowish then a bit dark or brownish.Now i only have the stem ( small trunk) in photo nº 1

I also brought couple of small pants uprooted from a garden and i planted then in a pot and one started to shoot as can be seen in PHOTO Nº 2.About 3 inches high and then it lost its leaves and now even the stem is drying from the top.

is it possible for you to answer both questions or shall i write the second one in a different post?

What can it be?i tried to see if there were bugs etc but could not find any.What could it be? what treatment can i use to help it or any treatment which could be generic for any kind of bugs.Thank you very much for your time and help .

Mick