Change password

Change password

A customer mailed me he wasn't able to change his password.
I tried in admin but got:

String could not be parsed as XML

How to solve this problem?

Aw: Change password

plugins / addons?

Aw: Change password

Plugin 204 pieces
Addon:
1 JoomShopping Ask Question 3.7.2 1
2 Universal CSV Import 4.14.8 2
3 Universal CSV Export 4.0.2 3
4 Addon Coupon Extra Fields 3.0.0 4
5 Delivery Note 2.1.9.1 5
6 addon netto in checkout 2.0.0 21
7 Addon minimum maximum quantity product 3.0.12 6
8 Product price User group 3.3.2 7
9 Payment for Usergroup 2.0.0 8
10 Comment in invoice 2.0.2 9
11 JoomShopping Filter extended 5.17.3 10
12 JoomShopping addon order gutschrift 2.2.5 11
13 Joomshopping Order Name 2.0.1 12
14 Invoice number 2.1.0 13
15 Joomshopping Payment Remind 2.0.2 15
16 Google Product Export 5.10.4 16
17 Category price per consignment 2.0.1 17
18 ExtPrice - prices netto / brutto 2.1.1 18
19 Addon attribute checkbox 2.0.6.1 19
20 Mollie API 2.5.1 20
21 Addon Quantity select 2.2.7 22

Aw: Change password

Do you have a dev site. (copy to other folder / other DB)

need disable plugin one to one.
Try change password.